US2856444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of aromatic from saturate hydrocarbons
Assignee: Sunoco Inc
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Filing: 1956-04-13
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Granted: 1958-10-14
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Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 Andre W Pollock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:24
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A CYCLIC PROCESS FOR THE SEPARATION OF HYDROCARBON MIXTURES INTO AROMATIC AND SATURATE FRACTIONS IN WHICH DURING EACH CYCLE A FEED STOCK COMPRISING AROMATIC AND SATURATE HYDROCARBONS IS PASSED THROUGH A BED OF ADSORBENT MATERIAL ON WHICH AROMATICS ARE MORE STRONGLY ADSORBED THAN SATURATES UNTIL THE CAPACITY OF THE ADSORBENT FOR FEED AROMATICS IS SUBSTANTIALLY EXHAUSTED, AFTER WHICH A DESORBENT HYDROCARBON STREAM COMPRISING SATURATED AND AROMATIC HYDROCARBONS BOILING OUTSIDE THE BOILING RANGE OF THE FEED STOCK IS PASSED THROUGH
Claim 2
Dependent Claim
80 words
IN A CYCLIC PROCESS FOR THE SEPARATION OF HYDROCARBON MIXTURES INTO AROMATIC AND SATURATE FRACTIONS IN WHICH DURING EACH CYCLE A FEED STOCK COMPRISING AROMATIC AND SATURATE HYDROCARBONS IS PASSED THROUGH A BED OF ADSORBENT MATERIAL ON WHICH AROMATICS ARE MORE STRONGLY ADSORBED THAN SATURATES UNTIL THE CAPACITY OF THE ADSORBENT FOR FEED AROMATICS IS SUBSTANTIALLY EXHAUSTED, AFTER WHICH A DESORBENT HYDROCARBON STREAM COMPRISING SATURATED AND AROMATIC HYDROCARBONS BOILING OUTSIDE THE BOILING RANGE OF THE FEED STOCK IS PASSED THROUGH
References Cited (Backward Citations)
US2441372A
Cited
US2576525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |